μαστίω
From LSJ
τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
English (LSJ)
[ῐ], poet. form of μαστίζω in pres. and impf.,
A whip, scourge, μάστιε νῦν Il.17.622, cf. Hes.Sc.466, Pancrat.Oxy.1085.15, Nonn.D. 1.179, al.:—Med., οὐρῇ δὲ πλευράς τε καὶ ἰσχία ἀμφοτέρωθεν μαστίεται Il.20.171.